She’s actually taking the piss out of a London accent.( more specifically cockney). ‘British’ accent implies you think all of Britain speaks like this.You would be wrong. If you want to take the piss, at least do some research.

oi it a joke innit chap? just a wee li’ol jest ol bean, dont get ye knickers in a twist. cheerio

joke or not, do your research. or is that too hard for Americans to do cause they’re do busy shooting up schools and having to pay for their healthcare? answer to that is probably.